/////////////////////////////////////////////////////////////////////////////
// 2023 -
//open source under Apache License Version 2.0
/////////////////////////////////////////////////////////////////////////////
//  Modifications by Kumo Inc.
// Copyright (C) Kumo inc. and its affiliates.
// Author: Jeff.li lijippy@163.com
// All rights reserved.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.
//

#ifndef _HDFS_LIBHDFS3_CLIENT_POSITIONSTRIPEDREADER_H_
#define _HDFS_LIBHDFS3_CLIENT_POSITIONSTRIPEDREADER_H_

#include <kmhdfs/client/stripe_reader.h>

namespace Hdfs {
namespace Internal {

class PositionStripeReader : public StripeReader {
public:
    PositionStripeReader(StripedBlockUtil::AlignedStripe & alignedStripe,
                         std::shared_ptr<ECPolicy> ecPolicy,
                         std::vector<LocatedBlock> & targetBlocks,
                         std::vector<StripeReader::BlockReaderInfo *> & readerInfos,
                         std::shared_ptr<CorruptedBlocks> corruptedBlocks,
                         std::shared_ptr<RawErasureDecoder> decoder,
                         StripedInputStreamImpl * dfsStripedInputStream,
                         std::shared_ptr<SessionConfig> conf);

    ~PositionStripeReader();

public:
    /**
     * Prepare all the data chunks.
     */
    void prepareDecodeInputs() override;

    /**
     * Prepare the parity chunk and block reader if necessary.
     */
    bool prepareParityChunk(int index) override;

    /**
     * Decode to get the missing data.
     */
    void decode() override;

    /**
     * Default close do nothing.
     */
    void close() override;

private:
    void initDecodeInputs(StripedBlockUtil::AlignedStripe & alignedStripe);

private:
    std::shared_ptr<ByteBuffer> codingBuffer;
};

}
}
#endif /* _HDFS_LIBHDFS3_CLIENT_POSITIONSTRIPEDREADER_H_ */
